201131310620 has 48 divisors (see below), whose sum is σ = 438649292928. Its totient is φ = 77408654400.

The previous prime is 201131310587. The next prime is 201131310659. The reversal of 201131310620 is 26013131102.

It is a super-2 number, since 2×201131310620² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 201131310592 and 201131310601.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1687706 + ... + 1802945.

It is an arithmetic number, because the mean of its divisors is an integer number (9138526936).

Almost surely, 2^201131310620 is an apocalyptic number.

201131310620 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

201131310620 is an abundant number, since it is smaller than the sum of its proper divisors (237517982308).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

201131310620 is a wasteful number, since it uses less digits than its factorization.

201131310620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3490770 (or 3490768 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 20.

Adding to 201131310620 its reverse (26013131102), we get a palindrome (227144441722).

The spelling of 201131310620 in words is "two hundred one billion, one hundred thirty-one million, three hundred ten thousand, six hundred twenty".